Description Diamondback Firearms, DB15, Semi-automatic Rifle, 556NATO, 16" Barrel, Black Finish, 2 Magazine, 10Rd, 12" MLOK Rail, JUGGERNAUT GRIP WARNING Caliber: 5.56 Nato Twist: 1:8 RH BCG: Shot-Peened, Magnetic Particle Inspected Mil-Spec 8620 Carrier